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Idledrop 1000rpm for less than a second when gaspedal is released

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Toyota Previa / Estima 2003 Automatic petrol 300000km

I need help to fix this problem. When the car is cold, everything is ok but after a minute or two the idle speed flucturates each time the gaspedal is been released. First a little bit, after a while it makes the car judder.
I have cleaned (but not replaced) the air flow sensor / intake air temperature sensor, cleaned the ISCV (idle speed regulator) and replaced the throttle position sensor.
The car has a wire from the pedal to the throttle section -should I try to adjust something here?
Here is a small video. Hope you can open it 🙂

Any help would be greatly appreciated!

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